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Geologic Hazards


Volcanoes, earthquakes, tsunamis, landslides, expansive soils and more

VolcanoesVolcanoes Volcanoes Articles about volcanoes, volcanic hazards and eruptions past and present. LandslidesLandslides Landslides A USGS fact sheet about landslides and events that trigger them. Largest HurricanesLargest Hurricanes Largest Hurricanes Are they determined by wind speed, value of damage, most deaths? Geology ToolsGeology Tools Geology Tools - Hammers, field bags, hand lenses, maps, hardness picks, gold pans.
Lightning HotspotLake Maracaibo Lightning World Record Lightning - This lake has more lightning than any other place in the world. San Andreas MapSan Andreas Map Google Map of the San Andreas - Zoom in to see the fault trace plotted atop of a map. Largest TsunamiLargest Tsunami Largest Tsunami - The wave with the highest run-up was in Lituya Bay, Alaska. Hazard InsuranceHazard Insurance Homeowners Insurance and Geologic Hazards Most policies do not cover geologic hazards.
Expansive SoilsExpansive Soils Expansive Soil Causes more damage than floods, hurricanes & tornadoes combined. LiquefactionLiquefaction Liquefaction occurs when water-saturated soil is severely shaken and loses strength. Impact CratersImpact Craters Asteroid Impact Craters! Zoom in on 50 of Earth\'s largest impact craters. Tsunami CausesTsunami Causes What Causes a Tsunami? Learn how plate motions trigger earthquakes and tsunamis.
Naming HurricanesHurricane Names Hurricane Names How are hurricanes named? Is your name on the list? Abandoned MinesAbandoned Mines Abandoned Mines accidents take 20 to 30 lives per year. Many could be prevented. Volcanic ExplosivityVolcanic Explosivity Volcanic Explosivity Rating volcanic eruptions based upon the volume of tephra ejected. NovaruptaNovarupta Most Powerful Eruption of the 20th Century - and most people have never heard of it.
Storm SurgeStorm Surge Storm Surge can be the most damaging and deadly aspect of a hurricane. Rock Fall PhotosYosemite Rock Fall Photos Yosemite Rock Fall Photos A photo sequence of a rockfall and debris avalanche by Herb Dunn. Lightning Strikes Maplightning map Lightning Strikes Map - shows the worldwide distribution of lightning activity. Atlantic TsunamisAtlantic Tsunamis Atlantic Tsunamis Rare events that can cause damage and threaten millions of people.
Pacific TsunamisPacific Tsunamis Pacific Tsunamis This ocean is surrounded by plate boundaries, that can produce tsunami. Indian Ocean TsunamisIndian Ocean Tsunamis Indian Ocean Tsunamis Deadly tsunamis triggered by earthquakes and volcanoes. Yosemite RockfallYosemite Rockfall Hazards Yosemite Rockfall Hazards have been mapped by the National Park Service.  



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